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Proportioning valve

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Old Apr 23, 2026 | 07:10 PM
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Default Proportioning valve

I have an 89 6 SPD. I am going to put new steel braided brake lines. My FSM is not with me. So, I apologize. I just thought of this. Does this car have a proportioning valve? Should I replace it. Does it require adjustment? Or are they preset from the factory?

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Old Apr 24, 2026 | 12:00 AM
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Hello, I have an 88 and with these cars years matter as there were changes from year to year. However, having said that the proportioning valve is integrated into the master cylinder.
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Old Apr 24, 2026 | 06:19 PM
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Thank you
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Old Apr 26, 2026 | 02:16 PM
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Default Master Cylinder Spring

The brake master cylinder has a spring that regulates the front to rear hydraulic bias. That spring can be changed to modify the bias

https://www.dougrippie.com/brake-bias-spring

^^^ I’m not advocating for the above spring to be installed. Just showing you the appearance of it
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